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Nadarajah R, Ludman P, Appelman Y, Brugaletta S, Budaj A, Bueno H, Huber K, Kunadian V, Leonardi S, Lettino M, Milasinovic D, Gale CP, Budaj A, Dagres N, Danchin N, Delgado V, Emberson J, Friberg O, Gale CP, Heyndrickx G, Iung B, James S, Kappetein AP, Maggioni AP, Maniadakis N, Nagy KV, Parati G, Petronio AS, Pietila M, Prescott E, Ruschitzka F, Van de Werf F, Weidinger F, Zeymer U, Gale CP, Beleslin B, Budaj A, Chioncel O, Dagres N, Danchin N, Emberson J, Erlinge D, Glikson M, Gray A, Kayikcioglu M, Maggioni AP, Nagy KV, Nedoshivin A, Petronio AP, Roos-Hesselink JW, Wallentin L, Zeymer U, Popescu BA, Adlam D, Caforio ALP, Capodanno D, Dweck M, Erlinge D, Glikson M, Hausleiter J, Iung B, Kayikcioglu M, Ludman P, Lund L, Maggioni AP, Matskeplishvili S, Meder B, Nagy KV, Nedoshivin A, Neglia D, Pasquet AA, Roos-Hesselink JW, Rossello FJ, Shaheen SM, Torbica A, Gale CP, Ludman PF, Lettino M, Bueno H, Huber K, Leonardi S, Budaj A, Milasinovic (Serbia) D, Brugaletta S, Appelman Y, Kunadian 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Potpara T, Marinkovic M, Mihajlovic M, Mujovic N, Kocijancic A, Mijatovic Z, Radovanovic M, Matic D, Milosevic A, Savic L, Subotic I, Uscumlic A, Zlatic N, Antonijevic J, Vesic O, Vucic R, Martinovic SS, Kostic T, Atanaskovic V, Mitic V, Stanojevic D, Petrovic M. Cohort profile: the ESC EURObservational Research Programme Non-ST-segment elevation myocardial infraction (NSTEMI) Registry. Eur Heart J Qual Care Clin Outcomes 2022; 9:8-15. [PMID: 36259751 DOI: 10.1093/ehjqcco/qcac067] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 10/11/2022] [Indexed: 11/12/2022]
Abstract
AIMS The European Society of Cardiology (ESC) EURObservational Research Programme (EORP) Non-ST-segment elevation myocardial infarction (NSTEMI) Registry aims to identify international patterns in NSTEMI management in clinical practice and outcomes against the 2015 ESC Guidelines for the management of acute coronary syndromes in patients presenting without ST-segment-elevation. METHODS AND RESULTS Consecutively hospitalised adult NSTEMI patients (n = 3620) were enrolled between 11 March 2019 and 6 March 2021, and individual patient data prospectively collected at 287 centres in 59 participating countries during a two-week enrolment period per centre. The registry collected data relating to baseline characteristics, major outcomes (in-hospital death, acute heart failure, cardiogenic shock, bleeding, stroke/transient ischaemic attack, and 30-day mortality) and guideline-recommended NSTEMI care interventions: electrocardiogram pre- or in-hospital, pre-hospitalization receipt of aspirin, echocardiography, coronary angiography, referral to cardiac rehabilitation, smoking cessation advice, dietary advice, and prescription on discharge of aspirin, P2Y12 inhibition, angiotensin converting enzyme inhibitor (ACEi)/angiotensin receptor blocker (ARB), beta-blocker, and statin. CONCLUSION The EORP NSTEMI Registry is an international, prospective registry of care and outcomes of patients treated for NSTEMI, which will provide unique insights into the contemporary management of hospitalised NSTEMI patients, compliance with ESC 2015 NSTEMI Guidelines, and identify potential barriers to optimal management of this common clinical presentation associated with significant morbidity and mortality.
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Affiliation(s)
- Ramesh Nadarajah
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, LS2 9JT Leeds, UK.,Leeds Institute of Data Analytics, University of Leeds, LS2 9JT Leeds, UK.,Department of Cardiology, Leeds Teaching Hospitals NHS Trust, LS1 3EX Leeds, UK
| | - Peter Ludman
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Yolande Appelman
- Department of Cardiology, Amsterdam UMC-Vrije Universiteit, Amsterdam Cardiovascular Sciences, Amsterdam, Netherlands
| | - Salvatore Brugaletta
- Hospital Clinic de Barcelona, Barcelona, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Andrzej Budaj
- Department of Cardiology, Center of Postgraduate Medical Education, Grochowski Hospital, Warsaw, Poland
| | - Hector Bueno
- Cardiology Department, Hospital Universitario 12 de Octubre and Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, Spain.,Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.,Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Kurt Huber
- 3rd Medical Department, Cardiology and Intensive Care Medicine, Clinic Ottakring (Wilhelminenhospital), Vienna, Austria.,Medical Faculty, Sigmund Freud University, Vienna, Austria
| | - Vijay Kunadian
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK.,Cardiothoracic Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Sergio Leonardi
- University of Pavia, Pavia, Italy.,Fondazione IRCCS Policlinico S.Matteo, Pavia, Italy
| | - Maddalena Lettino
- Cardio-Thoracic and Vascular Department, San Gerardo Hospital, ASST-Monza, Monza, Italy
| | - Dejan Milasinovic
- Department of Cardiology, University Clinical Center of Serbia and Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Chris P Gale
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, LS2 9JT Leeds, UK.,Leeds Institute of Data Analytics, University of Leeds, LS2 9JT Leeds, UK.,Department of Cardiology, Leeds Teaching Hospitals NHS Trust, LS1 3EX Leeds, UK
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Santos M, Rivero J, Mccullough S, Opotowsky A, Waxman A, Systrom D, Shah A, Santoro C, Esposito R, Schiano Lomoriello V, Raia R, De Palma D, Ippolito R, Ierano P, Arpino G, De Simone G, Galderisi M, Cameli M, Lisi M, Di Tommaso C, Solari M, Focardi M, Maccherini M, Henein M, Galderisi M, Mondillo S, Simova I, Katova T, Galderisi M, Pauncheva B, Vrettos A, Dawson D, Grigoratos C, Papapolychroniou C, Nihoyannopoulos P, Voilliot D, Huttin O, Vaugrenard T, Venner C, Sadoul N, Aliot E, Juilliere Y, Selton-Suty C, Hamdi I, Mahfoudhi H, Ben Mansour N, Dahmani R, Lahidheb D, Fehri W, Haouala H, Erken Pamukcu H, Gerede D, Sorgun M, Akbostanci C, Turhan S, Erol U, Voilliot D, Magne J, Dulgheru R, Kou S, Henri C, Caballero L, De Sousa C, Sprynger M, Pierard L, Lancellotti P, Panelo ML, Rodriguez-Fernandez A, Escriba-Bori S, Krol W, Konopka M, Burkhard K, Jedrzejewska I, Pokrywka A, Klusiewicz A, Chwalbinska J, Dluzniewski M, Braksator W, Elmissiri A, Eid M, Sayed I, Awadalla H, Schiano-Lomoriello V, Esposito R, Santoro C, Lo Iudice F, De Simone G, Galderisi M, Ibrahimi P, Jashari F, Johansson E, Gronlund C, Bajraktari G, Wester P, Henein M, Potluri R, Aziz A, Hooper J, Mummadi S, Uppal H, Asghar O, Chandran S, Surkova EA, Tereshina OV, Shchukin UV, Rubanenko AO, Medvedeva EA, Hamdi I, Mahfoudhi H, Ben Mansour N, Dahmani R, Lahidheb D, Fehri W, Haouala H, Krapf L, Nguyen V, Cimadevilla C, Himbert D, Brochet E, Iung B, Vahanian A, Messika-Zeitoun D, Van De Heyning CM, Magne J, Pierard L, Bruyere P, Davin L, De Maeyer C, Paelinck B, Vrints C, Lancellotti P, Bertrand P, Groenendaels Y, Vertessen V, Mullens W, Pettinari M, Gutermann H, Dion R, Verhaert D, Vandervoort P, Guven S, Sen T, Tufekcioglu O, Gucuk E, Uygur B, Kahraman E, Valuckiene Z, Jurkevicius R, Pranevicius R, Marcinkeviciene J, Zaliaduonyte-Peksiene D, Stoskute N, Zaliunas R. Club 35 Poster session 2: Thursday 4 December 2014, 08:30-18:00 * Location: Poster area. Eur Heart J Cardiovasc Imaging 2014. [DOI: 10.1093/ehjci/jeu241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Daskevicius K, Marcinkeviciene J, Joneliukstiene V, Zukauskas G. 483 – Forensic psychiatric-psychological characteristics of sexual offenders against children and adolescents in lithuania. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)75803-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Daskevicius K, Marcinkeviciene J. P-654 - Socio-psychological personality peculiarities of patients with limited responsibility. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)74821-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Van De Heyning CM, Magne J, Mahjoub H, Pibarot P, O'connor K, Pirlet C, Pierard L, Lancellotti P, Mohty D, Pibarot P, Deltreuil M, Tanguy B, Cassat C, Dumesnil J, Virot P, Zilberszac R, Gabriel H, Maurer G, Rosenhek R, Mizariene V, Zaliaduonyte-Peksiene D, Janenaite J, Marcinkeviciene J, Vaisvila T, Jankauskiene E, Ereminiene E, Vaskelyte J, Jurkevicius R, Ewe S, Haeck M, Witkowski T, Auger D, Leong D, Abate E, Ajmone N, Bax J, Delgado V. Oral Abstract Session: Predicting outcome in valvular heart disease * Thursday 8 December 2011, 08:30-10:00 * Location: Kaposvar. European Journal of Echocardiography 2011. [DOI: 10.1093/ejechocard/jer200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Daskevicius K, Marcinkeviciene J, Kazeniene Z. Posthumous forensic psychiatric examinations in litigations about capacity to contract. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)72477-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The particular difference of testamentary capacity is that unlike common civil capacity it cannot be limited. The authors’ objectives were to estimate the trends of diagnostics and conclusions in post mortem forensic examinations about capacity to contract, to establish the main diagnostic groups and to evaluate the factors of influence on experts’ choice.Data base and methodologyAll of the 147 statements on capacity to contract drawn by forensic psychiatrists in Lithuania during the period of five years. The data were sorted by a special questionnaire worked out by the authors. Statistical analysis was done by Pearson correlation method, using SAS, SPSS program packages for statistical processing.Results and conclusionsPosthumous examinations made up only 2.7 per cent among all accomplished in 5 years. Witnesses testimonies in 51.7 cases were so contradictory that half odf them had been discarded from considering. Medical files made the major material, however 16.5 per cent of them were psychiatrically irrelevant. 46.2 per cent contained descriptions of mental disorders, the subjects had not been consulted by psychiatrists. From all registered mental pictures 86.6 per cent had a background of somatoneurological disorder, and 13.4 per cent of mental syndrome had no association to physical condition. Mental disorder or severe somatic pathology alone do not always determine patient's incapacity. Due to experts’ 45 per cent contracts were nullified.
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Pabari PA, Kyriacou A, Moraldo M, Unsworth B, Baruah R, Sutaria N, Hughes A, Mayet J, Francis DP, Uejima T, Loboz K, Antonini-Canterin F, Polombo C, Carerj S, Hughes A, Vinereanu D, Evangelista A, Leftheriotis G, Fraser AG, Kiotsekoglou A, Govindan M, Govind SC, Saha SK, Camm AJ, Azcarate PM, Castano S, Rodriguez-Manero M, Arraiza M, Levy B, Barba J, Rabago G, Bastarrika G, Nemes A, Takacs R, Varkonyi T, Gavaller H, Baczko I, Forster T, Wittmann T, Papp JG, Lengyel C, Varro A, Tumasyan LR, Adamyan KG, Savu O, Mieghem T, Dekoninck P, Gucciardo L, Jurcut R, Giusca S, Popescu BA, Ginghina C, Deprest J, Voigt JU, Versiero M, Galderisi M, Esposito R, Rapacciuolo A, Esposito G, Raia R, Morgillo T, Piscione F, De Simone G, Oraby MA, Maklady FA, Mohamed EM, Eraki AZ, Zaliaduonyte-Peksiene D, Tamuleviciute E, Janenaite J, Marcinkeviciene J, Mizariene V, Bucyte S, Vaskelyte J, Trifunovic D, Nedeljkovic I, Popovic D, Ostojic M, Vujisic-Tesic B, Petrovic M, Stankovic S, Sobic-Saranovic D, Banovic M, Dikic-Djordjevic A, Savino K, Lilli A, Grikstaite E, Giglio V, Bordoni E, Maragoni G, Cavallini C, Ambrosio G, Nedeljkovic I, Ostojic M, Vujisic-Tesic B, Jakovljevic B, Petrovic M, Trifunovic D, Beleslin B, Nedeljkovic M, Banovic M, Petrovic O, Moral S, Rodriguez-Palomares J, Descalzo M, Marti G, Pineda V, Mahia P, Gutierrez L, Gonzalez-Alujas T, Evangelista A, Garcia-Dorado D, Schnell F, Donal E, Thebault C, Bernard A, Corbineau H, Le Breton H, Kochanowski J, Scislo P, Piatkowski R, Roik M, Marchel M, Kosior D, Opolski G, Lesniak-Sobelga AM, Wicher-Muniak E, Kostkiewicz M, Olszowska M, Suchon E, Klimeczek P, Banys P, Pasowicz M, Tracz W, Podolec P, Moral S, Rodriguez-Palomares J, Descalzo M, Pineda V, Mahia P, Gutierrez L, Gonzalez-Alujas T, Laynez A, Evangelista A, Garcia-Dorado D, Hoefsten DE, Loegstrup BB, Norager B, Moller JE, Flyvbjerg A, Egstrup K, Streb W, Szulik M, Nowak J, Markowicz-Pawlus E, Duszanska A, Sedkowska A, Kalarus Z, Kukulski T, Spinelli L, Morisco C, Assante Di Panzillo E, Buono F, Crispo S, Trimarco B, Oraby MA, Hawary AA, Nasr GM, Fawzy MM, Faber L, Scholtz W, Boergermann J, Wiemer M, Kleikamp G, Bogunovic N, Dimitriadis Z, Gummert J, Hering D, Horstkotte D, Luca' F, Gelsomino S, Lorusso R, Caciolli S, Carella R, Bille' G, De Cicco G, Pazzagli V, Gensini GF, Borowiec A, Dabrowski R, Janas J, Kraska A, Firek B, Kowalik I, Szwed H, Marcus KA, De Korte CL, Feuth T, Thijssen JM, Kapusta L, Dahl J, Videbaek L, Poulsen MK, Pellikka PA, Veien K, Andersen LI, Haghfelt T, Moller JE, Haberka M, Mizia - Stec K, Adamczyk T, Mizia M, Chmiel A, Pysz P, Sosnowski M, Gasior Z, Trusz - Gluza M, Tendera M, Niklewski T, Wilczek K, Chodor P, Podolecki T, Frycz-Kurek A, Kukulski T, Kalarus Z, Zembala M, Yurdakul S, Yildirimturk O, Tayyareci Y, Memic K, Demiroglu ICC, Aytekin S, Garcia Alonso CJ, Ferrer Sistach E, Delgado L, Lopez Ayerbe J, Vallejo Camazon N, Gual Capllonch F, Espriu Simon M, Ruyra X, Caballero Parrilla A, Bayes Genis A, Lecuyer L, Berrebi A, Florens E, Noghin M, Huerre C, Achouh P, Zegdi R, Fabiani JN, De Chiara B, Moreo A, Musca F, De Marco F, Lobiati E, Belli O, Mauri F, Klugmann S, Caballero A, Vallejo N, Gonzalez Guardia A, Nunez Aragon R, Bosch C, Lopez Ayerbe J, Ferrer E, Pedro Botet ML, Gual F, Bayes Genis A, Cusma-Piccione M, Zito C, Oreto G, Giuffre R, Todaro MC, Barbaro CM, Lanteri S, Longordo C, Salvia J, Carerj S, Bensaid A, Gallet R, Fougeres E, Lim P, Nahum J, Deux JF, Gueret P, Teiger E, Dubois-Rande JL, Monin JL, Yurdakul S, Tayyareci Y, Yildirimturk O, Behramoglu F, Colakoglu Z, Aytekin V, Demiroglu C, Aytekin S, Gargani L, Poggianti E, Bucalo R, Rizzo M, Agrusta F, Landi P, Sicari R, Picano E, Sutandar A, Siswanto BB, Irmalita I, Harimurti G, Hayashi SY, Nascimento MM, Lindholm B, Lind B, Seeberger A, Nowak J, Pachaly MA, Riella MC, Bjallmark A, Brodin LA, Poanta L, Porojan M, Dumitrascu DL, Ikonomidis I, Tzortzis S, Lekakis J, Kremastinos DT, Paraskevaidis I, Andreadou I, Nikolaou M, Katsibri P, Anastasiou-Nana M, Maceira Gonzalez AM, Ripoll C, Cosin-Sales J, Igual B, Salazar J, Belloch V, Cosin-Aguilar J, Pennell DJ, Masaki M, Pulido JN, Yuasa T, Gillespie S, Afessa B, Brown DR, Mankad SV, Oh JK, Gurghean AL, Mihailescu AM, Tudor I, Homentcovschi C, Muraru M, Bruckner IV, Correia CE, Rodrigues B, Moreira D, Santos LF, Gama P, Dionisio O, Cabral C, Santos O, Bombardini T, Gherardi S, Arpesella G, Valente S, Calamai I, Pasanisi E, Sansoni S, Picano E, Szymanski P, Dobrowolski P, Lipczynska M, Klisiewicz A, Hoffman P, Stepowski D, Kurtz B, Grezis-Soulie G, Savoure A, Anselme F, Bauer F, Castillo J, Herszkowicz N, Ferreira C, Goscinska A, Mizia-Stec K, Gasior Z, Mizia M, Haberka M, Chmiel A, Poborski W, Azevedo O, Quelhas I, Guardado J, Fernandes M, Miranda CS, Gaspar P, Lourenco A, Medeiros R, Almeida J, L Bennani S, Algalarrondo V, Dinanian S, Guiader J, Juin C, Adams D, Slama MS, Onaindia JJ, Quintana O, Velasco S, Astigarraga E, Cacicedo A, Gonzalez J, Rodriguez I, Sadaba M, Eneriz M, Laraudogoitia Zaldumbide E, Nunez-Gil I, Luaces M, Zamorano J, Garcia Rubira JC, Vivas D, Ibanez B, Marcos Alberca P, Fernandez Golfin C, Alonso J, Macaya C, Silva Marques J, Almeida AG, Carvalho V, Jorge C, Silva D, Gato Varela M, Martins S, Brito D, Lopes MG, Tripodi E, Miserrafiti B, Montemurro V, Scali R, Tripodi P, Marchel M, Kochanowski J, Piatkowski R, Scislo P, Winkler A, Madej A, Hausmanowa-Petrusewicz I, Opolski G, Fijalkowski M, Koprowski A, Jaguszewski M, Galaska R, Taszner M, Rynkiewicz A, Citro R, Rigo F, Provenza G, Ciampi Q, Patella MM, D'andrea A, Antonini-Canterin F, Vriz O, Astarita C, Bossone E, Heggemann F, Walter TH, Kaelsch TH, Sueselbeck T, Papavassiliu TH, Borggrefe M, Haghi D, Monk-Hansen T, Have Dall C, Bisgaard Christensen S, Snoer M, Gustafsson F, Rasmusen H, Prescott E, Finocchiaro G, Pinamonti B, Merlo M, Barbati G, Di Lenarda A, Bussani R, Sinagra G, Butz T, Faber L, Lang CN, Meissner A, Plehn G, Yeni H, Langer C, Horstkotte D, Trappe HJ, Gu X, Gu XY, He YH, Li ZA, Han JC, Chen J, Gaudron P, Niemann M, Herrmann S, Hu K, Bijnens B, Hillenbrand H, Beer M, Ertl G, Weidemann F, Mazzone A, Mariani M, Foffa I, Vianello A, Del Ry S, Bevilacqua S, Andreassi MG, Glauber M, Berti S, Kochanowski J, Scislo P, Piatkowski R, Grabowski M, Roik M, Postula M, Marchel M, Kosior D, Opolski G, Dragulescu A, Van Arsdell G, Al-Radi O, Caldarone C, Mertens L, Lee KJ, Unsworth B, Casula RP, Yadav H, Baruah R, Cherian A, Sutaria N, Hughes AD, Mayet J, Francis DP, Vitarelli A, D'orazio S, Nguyen BL, Iorio G, Battaglia D, Caranci F, Padella V, Capotosto L, Alessandroni L, Barilla F, Cardin C, Hascoet S, Saudron M, Caudron G, Arnaudis B, Acar P, Sun MM, Shu XH, Pan CZ, Fang XY, Kong DH, Fang F, Zhang Q, Chan YS, Xie JM, Yip WK, Lam YY, Sanderson JE, Yu CM, Rosca M, O' Connor K, Romano G, Magne J, Calin A, Popescu BA, Muraru D, Pierard L, Ginghina C, Lancellotti P, Roushdy A, Elfiky I, El Shahid G, Elfiky A, El Sayed M, Wierzbowska-Drabik K, Chrzanowski L, Kapusta A, Plonska-Goscinak E, Krzeminska-Pakula M, Kurpesa M, Rechcinski T, Trzos E, Kasprzak JD, Ersboll MK, Valeur N, Mogensen UM, Andersen M, Moller JE, Hassager C, Sogaard P, Kober LV, Kloeckner M, Hayat D, Nahum J, Dussault C, Lellouche N, Elbaz N, Dubois-Rande JL, Gueret P, Lim P, Demopoulos A, Hatzigeorgiou G, Leontiades E, Motsi A, Karatasakis G, Athanassopoulos G, Zycinski P, Chrzanowski L, Wierzbowska-Drabik K, Kasprzak J, Vazquez Alvarez MC, Medrano Lopez C, Camino Lopez M, Granja S, Zunzunegui Martinez JL, Maroto Alvaro E, Tsai WC, Chen JY, Liu YW, Lin CC, Tsai LM, Silva Marques J, Gomes DC, Robalo Martins S, Gois MR, Ribeiro S, Nunes Diogo A, Almeida AG, Lopes MG, Zito C, Sengupta P, Di Bella G, Cusma-Piccione M, Oreto G, Caracciolo G, Longordo C, Lentini S, Carerj S, Kinova E, Zlatareva N, Goudev A, Papagiannis N, Mpouki M, Papagianni A, Vorria M, Mpenetos G, Lytra D, Papadopoulou E, Sgourakis P, Malakos J, Kyriazis J, Saha SK, Kodali V, Toole R, Govind SC, Kiotsekoglou A, Gopal AS, Celutkiene J, Rudys A, Grabauskiene V, Glaveckaite S, Sadauskiene E, Lileikiene Z, Bickauskaite N, Ciburiene E, Skorniakov V, Laucevicius A, Attenhofer Jost CH, Pfyffer M, Lindquist R, Santos JLF, Coelho ORC, Mady CM, Picard MHP, Salemi VMC, Funk L, Butz T, Lang CN, Prull MW, Plehn G, Yeni H, Meissner A, Trappe HJ, Tsai WC, Liu YW, Shih JY, Lin CC, Huang YY, Tsai LM, Lancellotti P, Donal E, Magne J, O'connor K, Moonen M, Pierard LA, Cozma DC, Mornos C, Ionac A, Petrescu L, Dragulescu D, Dan R, Popescu I, Dragulescu SI, Von Lueder TG, Hodt A, Gjerdalen GF, Andersen TE, Solberg EE, Steine K, Savu O, Van Mieghem T, Dekoninck P, Gucciardo L, Jurcut R, Giusca S, Popescu BA, Ginghina C, Deprest J, Voigt JU, Rostek M, Pikto-Pietkiewicz W, Dluzniewski M, Antoniewicz A, Poletajew S, Borowka A, Pasierski T, Malyutina SK, Ryabikov M, Ragino J, Ryabikov A, Sitia S, Tomasoni L, Atzeni F, Gianturco L, Sarzi-Puttini P, De Gennaro Colonna V, Turiel M, Uejima T, Loboz K, Vriz O, Polombo C, Carerj S, Hughes A, Vinereanu D, Gutierrez FR, Lefhtheriotis G, Fraser AG, Hurst RT, Nelson MR, Mookadam F, Thota V, Emani U, Al Harthi M, Stepanek J, Cha S, Lester SJ, Ho EMM, Hemeryck L, Hall M, Scott K, Bennett K, Mahmud A, Daly C, King G, Murphy RT, Brown AS, Teske AJ, D'Hooge J, Claus P, Rademakers F, Voigt JU, Santos L, Cortez-Dias N, Silva D, Silva Marques J, Ribeiro S, Goncalves S, Almeida Ribeiro M, Robalo Martins S, Bordalo E Sa A, Lopes MG, Teske AJ, D'Hooge J, Claus P, Rademakers F, Voigt JU, Magnino C, Marcos-Alberca P, Milan A, Nunez-Gil I, Almeria C, Caniadas V, Rodrigo JL, Perez De Isla L, Macaya C, Zamorano JL, Gustafsson U, Larsson M, Bjallmark A, Lindqvist P, Brodin L, Waldenstrom A, Roosens B, Hernot S, Droogmans S, Van Camp G, Lahoutte T, Lancellotti P, Cosyns B, Ho EMM, Scott K, Hemeryck L, Hall M, Bennett K, Mahmud A, Daly C, King G, Murphy RT, Brown AS, Rao CM, Aguglia D, Casciola G, Imbesi C, Marvelli A, Sgro M, Benedetto D, Tripepi R, Zoccali C, Benedetto FA, Muraru D, Badano LP, Cardillo M, Del Mestre L, Gianfagna P, Proclemer A, Tschernich HD, Mora B, Base E, Weber U, Dumfarth J, Mukherjee C, Skaltsiotis HS, Kaladaridis AK, Bramos DB, Kottis GK, Antoniou AA, Agrios IA, Takos DT, Vasiladiotis NV, Pamboucas KP, Toumanidis STT, Shim A, Kasprzak JD, Lipec P, Michalski B, Wozniakowski B, Stefanczyk L, Rotkiewicz A, Cameli M, Lisi M, Padeletti M, Bigio E, Bernazzali S, Tsoulpas C, Maccherini M, Henein M, Mondillo S, Garcia Lunar I, Mingo Santos S, Monivas Palomero V, Mitroi C, Beltran Correas P, Ruiz Bautista L, Muniz Lozano A, Gonzalez Gonzalez M, Pabari PA, Stegemann B, Willson K, Kyriacou A, Moraldo M, Mayet J, Hughes A, Francis DP, Zeppellini R, Iavernaro A, Zadro M, Carasi M, De Domenico R, Rigo T, Artuso E, Erente G, Ramondo A, Le TT, Huang FQ, Gu Y, Tan RS. Poster session II * Thursday 9 December 2010, 14:00-18:00. European Journal of Echocardiography 2010. [DOI: 10.1093/ejechocard/jeq138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Marcinkeviciene J, Luo Y, Graciani NR, Combs AP, Copeland RA. Mechanism of Inhibition of beta-site amyloid precursor protein-cleaving enzyme (BACE) by a statine-based peptide. J Biol Chem 2001; 276:23790-4. [PMID: 11306583 DOI: 10.1074/jbc.m101896200] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Inhibition of beta-site amyloid precursor protein-cleaving enzyme by a statine-based inhibitor has been studied using steady state and stopped-flow methods. A slow onset rate of inhibition has been observed under steady state conditions, and a K(i) of 22 nm has been derived using progress curves analysis. Simulation of stopped-flow protein fluorescence transients provided an estimate of the K(d) for initial inhibitor binding of 660 nm. A two-step inhibition mechanism is proposed, wherein slower "tightening up" of the initial encounter complex occurs. Two hypotheses have been proposed in the literature to address the nature of the slow step in the inhibition of aspartic proteases by peptidomimetic inhibitors: a conformational change related to the "flap" movement and displacement of a catalytic water. We compared substrate and inhibitor binding rates under pre-steady-state conditions. Both ligands are likely to cause flap movement, whereas no catalytic water replacement occurs during substrate binding. Our results suggest that both ligands bind to the enzyme at a rate significantly lower than the diffusion limit, but there are additional rate limitations involved in inhibitor binding, resulting in a k(on) of 3.5 x 10(4) m(-)1 s(-)1 for the inhibitor compared with 3.5 x 10(5) m(-)1 s(-)1 for the substrate. Even though specific intermediate formation steps might be different in the productive inhibitor and substrate binding to beta-site amyloid precursor protein-cleaving enzyme, a similar final optimized conformation is achieved in both cases, as judged by the comparable free energy changes (DeltaDeltaG of 2.01 versus 1.97 kcal/mol) going from the initial to the final enzyme-inhibitor or enzyme-substrate complexes.
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Affiliation(s)
- J Marcinkeviciene
- Department of Chemical Enzymology and Combinatorial Chemistry Group, Dupont Pharmaceuticals Company, Wilmington, Delaware 19880-0400, USA.
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Marcinkeviciene J, Jiang W, Kopcho LM, Locke G, Luo Y, Copeland RA. Enoyl-ACP reductase (FabI) of Haemophilus influenzae: steady-state kinetic mechanism and inhibition by triclosan and hexachlorophene. Arch Biochem Biophys 2001; 390:101-8. [PMID: 11368521 DOI: 10.1006/abbi.2001.2349] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Steady-state kinetics, equilibrium binding, and primary substrate kinetic isotope effect studies revealed that the reduction of crotonyl-CoA by NADH, catalyzed by Haemophilus influenzae enoyl-ACP reductase (FabI), follows a rapid equilibrium random kinetic mechanism with negative interaction among the substrates. Two biphenyl inhibitors, triclosan and hexachlorophene, were studied in the context of the kinetic mechanism. IC(50) values for triclosan in the presence and absence of NAD(+) were 0.1 +/- 0.02 and 2.4 +/- 0.02 microM, respectively, confirming previous observations that the E-NAD(+) complex binds triclosan more tightly than the free enzyme. Preincubation of the enzyme with triclosan and NADH suggested that the E-NADH complex is the active triclosan binding species as well. These results were reinforced by measurement of binding kinetic transients. Intrinsic protein fluorescence changes induced by binding of 20 microM triclosan to E, E-NADH, E-NAD(+), and E-crotonyl-CoA occur at rates of 0.0124 +/- 0.001, 0.0663 +/- 0.002, 0.412 +/- 0.01, and 0.0069 +/- 0.0001 s(-1), respectively. The rate of binding decreased with increasing crotonyl-CoA concentrations in the E-crotonyl-CoA complex, and the extrapolated rate at zero concentration of crotonyl-CoA corresponded to the rate observed for the binding to the free enzyme. This suggests that triclosan and the acyl substrate share a common binding site. Hexachlorophene inhibition, on the other hand, was NAD(+)- and time-independent; and the calculated IC(50) value was 2.5 +/- 0.4 microM. Steady-state inhibition patterns did not allow the mode of inhibition to be unambiguously determined, but binding kinetics suggested that free enzyme, E-NAD(+), and E-crotonyl-CoA have similar affinity for hexachlorophene, since the k(obs)s were in the same range of 20-24 s(-1). When the E-NADH complex was mixed with hexachlorophene ligand, concentration-independent fluorescence quenching at 480 nm was observed, suggesting at least partial competition between NADH and hexachlorophene for the same binding site. Mutual exclusivity studies, together with the above-discussed results, indicate that triclosan and hexachlorophene bind at different sites of H. influenzae FabI.
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Affiliation(s)
- J Marcinkeviciene
- Department of Chemical Enzymology, Dupont Pharmaceutical Company, Wilmington, Delaware 19880-0400, USA.
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Mallender WD, Yager D, Onstead L, Nichols MR, Eckman C, Sambamurti K, Kopcho LM, Marcinkeviciene J, Copeland RA, Rosenberry TL. Characterization of recombinant, soluble beta-secretase from an insect cell expression system. Mol Pharmacol 2001; 59:619-26. [PMID: 11179458 DOI: 10.1124/mol.59.3.619] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The beta-site amyloid precursor protein-cleaving enzyme (BACE) cleaves the amyloid precursor protein to produce the N terminus of the amyloid beta peptide, a major component of the plaques found in the brains of Alzheimer's disease patients. Sequence analysis of BACE indicates that the protein contains the consensus sequences found in most known aspartyl proteases, but otherwise has only modest homology with aspartyl proteases of known three-dimensional structure (i.e., pepsin, renin, or cathepsin D). Because BACE has been shown to be one of the two proteolytic activities responsible for the production of the Abeta peptide, this enzyme is a prime target for the design of therapeutic agents aimed at reducing Abeta for the treatment of Alzheimer's disease. Toward this ultimate goal, we have expressed a recombinant, truncated human BACE in a Drosophila melanogaster S2 cell expression system to generate high levels of secreted BACE protein. The protein was convenient to purify and was enzymatically active and specific for cleaving the beta-secretase site of human APP, as demonstrated with soluble APP as the substrate in novel sandwich enzyme-linked immunosorbent assay and Western blot assays. Further kinetic analysis revealed no catalytic differences between this recombinant, secreted BACE, and brain BACE. Both showed a strong preference for substrates that contained the Swedish mutation, where NL is substituted for KM immediately upstream of the cleavage site, relative to the wild-type sequence, and both showed the same extent of inhibition by a peptide-based inhibitor. The capability to produce large quantities of BACE enzyme will facilitate protein structure determination and inhibitor development efforts that may lead to the evolution of useful Alzheimer's disease treatments.
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Affiliation(s)
- W D Mallender
- Department of Pharmacology, Mayo Foundation for Medical Education and Research, Mayo Clinic Jacksonville, Jacksonville, Florida, USA
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Copeland RA, Marcinkeviciene J, Haque TS, Kopcho LM, Jiang W, Wang K, Ecret LD, Sizemore C, Amsler KA, Foster L, Tadesse S, Combs AP, Stern AM, Trainor GL, Slee A, Rogers MJ, Hobbs F. Helicobacter pylori-selective antibacterials based on inhibition of pyrimidine biosynthesis. J Biol Chem 2000; 275:33373-8. [PMID: 10938275 DOI: 10.1074/jbc.m004451200] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
We report the discovery of a class of pyrazole-based compounds that are potent inhibitors of the dihydroorotate dehydrogenase of Helicobacter pylori but that do not inhibit the cognate enzymes from Gram-positive bacteria or humans. In culture these compounds inhibit the growth of H. pylori selectively, showing no effect on other Gram-negative or Gram-positive bacteria or human cell lines. These compounds represent the first examples of H. pylori-specific antibacterial agents. Cellular activity within this structural class appears to be due to dihydroorotate dehydrogenase inhibition. Minor structural changes that abrogate in vitro inhibition of the enzyme likewise eliminate cellular activity. Furthermore, the minimum inhibitory concentrations of these compounds increase upon addition of orotate to the culture medium in a concentration-dependent manner, consistent with dihydroorotate dehydrogenase inhibition as the mechanism of cellular inhibition. The data presented here suggest that targeted inhibition of de novo pyrimidine biosynthesis may be a valuable mechanism for the development of antimicrobial agents selective for H. pylori.
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Affiliation(s)
- R A Copeland
- Department of Chemical Enzymology, the Department of Chemical and Physical Sciences, and the Antimicrobials Group, DuPont Pharmaceuticals Company, Wilmington, Delaware 19880-0400, USA
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Marcinkeviciene J, Rogers MJ, Kopcho L, Jiang W, Wang K, Murphy DJ, Lippy J, Link S, Chung TD, Hobbs F, Haque T, Trainor GL, Slee A, Stern AM, Copeland RA. Selective inhibition of bacterial dihydroorotate dehydrogenases by thiadiazolidinediones. Biochem Pharmacol 2000; 60:339-42. [PMID: 10856428 DOI: 10.1016/s0006-2952(00)00348-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Dihydroorotate dehydrogenase is a critical enzyme of de novo pyrimidine biosynthesis in prokaryotic and eukaryotic cells. Differences in the primary structure of the enzymes from Gram-positive and -negative bacteria and from mammals indicate significant structural divergence among these enzymes. We have identified a class of small molecules, the thiadiazolidinediones, that inhibit prototypical enzymes from Gram-positive and -negative bacteria, but are inactive against the human enzyme. The most potent compound in our collection functioned as a time-dependent irreversible inactivator of the bacterial enzymes with k(inact)/K(i) values of 48 and 500 M(-1) sec(-1) for the enzymes from Escherichia coli and Enterococcus faecalis, respectively. The data presented here indicate that it is possible to inhibit prokaryotic dihydroorotate dehydrogenases selectively while sparing the mammalian enzyme. Thus, this enzyme may represent a valuable target for the development of novel antibiotic compounds.
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Affiliation(s)
- J Marcinkeviciene
- Department of Chemical Enzymology, The DuPont Pharmaceuticals Co., Wilmington, DE 19880-0400, USA
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Jiang W, Locke G, Harpel MR, Copeland RA, Marcinkeviciene J. Role of lys100 in human dihydroorotate dehydrogenase: mutagenesis studies and chemical rescue by external amines. Biochemistry 2000; 39:7990-7. [PMID: 10891080 DOI: 10.1021/bi000630d] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Chemical modification, mutagenesis, chemical rescue, and isotope effect studies are used to identify and probe the roles of several conserved amino acid groups in catalysis by human dihydroorotate dehydrogenase. Time- and pH-dependent inactivation of human dihydroorotate dehydrogenase by trinitrobenzenesulfonate implicates at least one critical lysyl residue in catalysis. Of four highly conserved lysines, only the cognate of Lys255 was previously suggested to have catalytic functionality. We now show that replacement of either Lys184 or Lys186 by mutagenesis does not impact, whereas substitution of Lys100 abolishes, enzymatic activity. However, activity is partially restored to K100C (or K100A) by inclusion of exogenous primary amines in reaction mixtures. This rescued activity saturates with respect to numerous amines and exhibits a steric discrimination reflected in K(d,(amine)) values. For all amines, rescued k(cat) values were only approximately 10% of wild type and independent of amine basicity. K(M) values for dihydroorotate and coenzyme Q(0) were similar to wild type. Thus, exogenous amines (as surrogates for Lys100) apparently complement a chemical, not binding, step(s) of catalysis, which does not entail proton transfer. In support of this postulate, solvent kinetic isotope effect analysis indicates that Lys100 stabilizes developing negative charge on the isoalloxazine ring of flavin mononucleotide during hydride transfer, as has been observed for a number of flavoprotein oxidoreductases. Ser215 of human dihydroarotate dehydrogenase (DHODase) was also studied because of its alignment with the putative active-site base Cys130 of Lactococcus lactisDHODase. Substantial retention of activity by S215C, yet complete loss of activity for S215A, is consistent with Ser215 serving as the active-site base in the human enzyme.
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Affiliation(s)
- W Jiang
- Department of Chemical Enzymology, DuPont Pharmaceuticals Company, P. O. Box 80400, Wilmington, Delaware 19880-0400, USA
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Marcinkeviciene J, Jiang W, Locke G, Kopcho LM, Rogers MJ, Copeland RA. A second dihydroorotate dehydrogenase (Type A) of the human pathogen Enterococcus faecalis: expression, purification, and steady-state kinetic mechanism. Arch Biochem Biophys 2000; 377:178-86. [PMID: 10775458 DOI: 10.1006/abbi.2000.1769] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We report the identification, expression, and characterization of a second Dihydroorotate dehydrogenase (DHODase A) from the human pathogen Enterococcus faecalis. The enzyme consists of a polypeptide chain of 322 amino acids that shares 68% identity with the cognate type A enzyme from the bacterium Lactococcus lactis. E. faecalis DHODase A catalyzed the oxidation of l-dihydroorotate while reducing a number of substrates, including fumarate, coenzyme Q(0), and menadione. The steady-state kinetic mechanism has been determined with menadione as an oxidizing substrate at pH 7.5. Initial velocity and product inhibition data suggest that the enzyme follows a two-site nonclassical ping-pong kinetic mechanism. The absorbance of the active site FMN cofactor is quenched in a concentration-dependent manner by titration with orotate and barbituric acid, two competitive inhibitors with respect to dihydroorotate. In contrast, titration of the enzyme with menadione had no effect on FMN absorbance, consistent with nonoverlapping binding sites for dihyroorotate and menadione, as suggested from the kinetic mechanism. The reductive half-reaction has been shown to be only partially rate limiting, and an attempt to evaluate the slow step in the overall reaction has been made by simulating orotate production under steady-state conditions. Our data indicate that the oxidative half-reaction is a rate-limiting segment, while orotate, most likely, retains significant affinity for the reduced enzyme, as suggested by the product inhibition pattern.
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Affiliation(s)
- J Marcinkeviciene
- Department of Chemical Enzymology, DuPont Pharmaceutical Co., Wilmington, Delaware 19880-0400, USA.
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Marcinkeviciene J, Tinney LM, Wang KH, Rogers MJ, Copeland RA. Dihydroorotate dehydrogenase B of Enterococcus faecalis. Characterization and insights into chemical mechanism. Biochemistry 1999; 38:13129-37. [PMID: 10529184 DOI: 10.1021/bi990674q] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Enterococcus faecalis dihydroorotate dehydrogenase B is a heterodimer of 28 and 33 kDa encoded by the pyrK and pyrDb genes. Both subunits copurify during all chromatographic steps, and, as determined by HPLC, one FMN and one FAD are bound per heterodimer. The enzyme catalyzes efficient oxidation of 4-S-NADH by orotate. Isotope effect and pH data suggest that reduction of flavin by NADH at the PyrK site is only partially rate limiting with no kinetically significant proton transfer occurring in the reductive half-reaction; therefore, a group exhibiting a pK of 5.7 +/- 0.2 represents a residue involved in binding of NADH rather than in catalysis. The reducing equivalents are shuttled between the NADH-oxidizing flavin in PyrK and the orotate-reacting flavin in PyrDb, by iron-sulfur centers through flavin semiquinones as intermediates. A solvent kinetic isotope effect of 2.5 +/- 0.2 on V is indicative of rate-limiting protonation in the oxidative half-reaction and most likely reflects the interaction between the isoalloxazine N1 of the orotate-reducing flavin and Lys 168 (by analogy with L. lactis DHODase A). The oxidative half-reaction is facilitated by deprotonation of the group(s) with pK(s) of 5.8-6.3 and reflects either deprotonation of the reduced flavin or binding of orotate; this step is followed by hydride transfer to C6 and general acid-assisted protonation (pK of 9.1 +/- 0.2) at C5 of the product.
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Affiliation(s)
- J Marcinkeviciene
- Department of Chemical Enzymology and Antimicrobial Group, DuPont Pharmaceuticals, Wilmington, Delaware 19880-0400, USA
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Wang PF, Marcinkeviciene J, Williams CH, Blanchard JS. Thioredoxin reductase-thioredoxin fusion enzyme from Mycobacterium leprae: comparison with the separately expressed thioredoxin reductase. Biochemistry 1998; 37:16378-89. [PMID: 9819230 DOI: 10.1021/bi980754e] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Thioredoxin reductase (TrxR) catalyzes the reduction of thioredoxin (Trx) by NADPH. A unique gene organization of TrxR and Trx has been found in Mycobacterium leprae, where TrxR and Trx are encoded by a single gene and, therefore, are expressed as a fusion protein (MlTrxR-Trx). This fusion enzyme is able to catalyze the reduction of thioredoxin or 5,5'-dithiobis(2-nitrobenzoic acid) or 1, 4-naphthoquinone by NADPH, though the activity is much lower than that of Escherichia coli TrxR. It has been proposed that a large conformational change is required in catalysis of E. coli TrxR. Because the reductase portion of the enzyme from M. leprae shows significant primary structure similarity with E. coli TrxR, it is possible that MlTrxR-Trx may require a similar conformational change and that the change in conformation may be affected by the tethered Trx. The reductase has been expressed without Trx attached (MlTrxR). As reported here, comparison of the steady-state and pre-steady-state kinetics of MlTrxR-Trx with those of MlTrxR suggests that the low reductase activity of the fusion enzyme is an inherent property of the reductase, and that any steric limitation caused by the attached thioredoxin in the fusion protein makes only a minor contribution to the low activity. Titration of MlTrxR-Trx and MlTrxR with 3-aminopyridine adenine dinucleotide phosphate (AADP+), an NADP(H) analogue, results in only slight quenching of FAD fluorescence, suggesting an enzyme conformation in which the binding site of AADP+ is not close to the FAD, as in one of the conformations of E. coli TrxR.
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Affiliation(s)
- P F Wang
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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Patel MP, Marcinkeviciene J, Blanchard JS. Enterococcus faecalis glutathione reductase: purification, characterization and expression under normal and hyperbaric O2 conditions. FEMS Microbiol Lett 1998; 166:155-63. [PMID: 9741094 DOI: 10.1111/j.1574-6968.1998.tb13197.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Glutathione reductase is found ubiquitously in eukaryotes and Gram-negative bacteria, and plays a significant role in bacterial defense against oxidative stress. Glutathione reductase from the Gram-positive bacterium Enterococcus faecalis was purified to homogeneity using anion exchange, hydrophobic interaction, and affinity chromatography. The homogeneous 49-kDa enzyme contained 1 mol bound FAD per subunit. The determined N-terminal amino acid sequence of the E. faecalis enzyme displays significant identity with glutathione reductases from other Gram-negative and Gram-positive bacteria, as well as yeast and human erythrocyte reductases. The kinetic mechanism is ping-pong, and the determined kinetic parameters exhibited by the E. faecalis glutathione reductase are similar to those found for glutathione reductases from yeast, Escherichia coli, and human erythrocyte. A two-fold increased expression of glutathione reductase activity and a three-fold induction of glutathione peroxidase activity were observed under hyperbaric O2 growth conditions without a corresponding change in the total glutathione and soluble thiol content. The difference in the expression of the enzyme, and its cognate substrate's intracellular concentration, under these conditions suggest that the gene encoding glutathione reductase is responsive to oxygen concentration, but that the genes encoding the glutathione synthesizing enzymes are not linked to an oxygen-sensitive promoter.
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Affiliation(s)
- M P Patel
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY, USA
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18
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Abstract
Lipoamide dehydrogenase from Mycobacterium smegmatis was purified to homogeneity over 60-fold. Of 20 amino acid residues identified at the amino terminus of the enzyme, 18 and 17 were identical to the sequences of Mycobacterium leprae and Pseudomonas fluorescens lipoamide dehydrogenases, respectively. The visible spectrum of the isolated enzyme was characteristic of a flavin in apolar environment. Reduction of the enzyme with dithionite results in the appearance of an absorbance shoulder at 530-550 nm, suggesting that reducing equivalents of the two-electron reduced enzyme reside predominantly on the redox-active disulfidedithiol. The kinetic mechanism of the forward (NAD+ reducing) and reverse (NADH oxidizing) reactions proved difficult to study due to severe substrate inhibition by NAD+ and NADH. The rate of lipoamide reduction was found to depend upon the NAD+/NADH ratio, with the reaction being activated at low ratios and inhibited at high ratios. The use of 3-acetylpyridine adenine dinucleotide allowed initial velocity kinetics to be performed and revealed that the kinetic mechanism is ping pong. In addition to catalyzing the reversible oxidation of dihydrolipoamide, the enzyme displayed high oxidase activity (30% of the lipoamide reduction rate), hydrogen and t-butyl peroxide reductase activity (10% of the lipoamide reduction rate), and both naphthoquinone and benzoquinone reduction (approximately 200% of the lipoamide reduction rate). The enzyme failed to catalyze the redox cycling of nitrocompounds, but could anaerobically reduce nitrofurazone. The lipoamide-reducing reaction was reversibly inactivated by sodium arsenite, but no decrease in diaphorase activity was observed under these conditions.
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Affiliation(s)
- J Marcinkeviciene
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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Dumcius A, Salcius K, Raliene L, Vaskelyte J, Giedraitis S, Sirvinskas E, Marcinkeviciene J, Skucas J. Electrostimulated cardiomyoplasty: from experimental to clinical studies. Pacing Clin Electrophysiol 1996; 19:1205-10. [PMID: 8865218 DOI: 10.1111/j.1540-8159.1996.tb04190.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Cardiomyoplasty is a method for managing patients with dilated cardiomyopathy. We evaluated the means of carbon fiber electrode stimulation of the nerve to the latissimus dorsi muscle (LDM) in dogs to increase skeletal muscle contractility. Histochemical examination of biopsies of muscle electrically conditioned by a single pulse stimulator via the thoracodorsal nerve demonstrated transformation of muscle into fatigue resistant slow fibers without damage to muscle or nerve tissue. Canine experiments confirmed that carbon fibers are one of the best electrodes for chronic LDM stimulation. Between 1988 and 1992, we operated on ten patients, New York Heart Association (NYHA) Class III (4 patients) and Class IV (6 patients), with a mean left ventricular ejection fraction (LVEF) of 23%. The indications for cardiomyoplasty were idiopathic (7 patients) and ischemic (3 patients) cardiomyopathy refractory to maximum medical therapy. The operative procedure was performed via median sternotomy (5 patients) and left thoracotomy (5 patients). There was one operative mortality and two additional deaths during the late follow-up period. The mean postoperative LVEF increased to 27%. Functional class, quality-of-life, and ventricular performance were improved after cardiomyoplasty. Two of the surviving patients are in NYHA Class I, four in Class II, and one in Class III.
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Affiliation(s)
- A Dumcius
- Laboratory of Cardiovascular Surgery, Institute for Biomedical Research, Kaunas, Lithuania
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Kulys J, Razumas V, Kazlauskaite J, Marcinkeviciene J, Buch-Rasmussen T, Hansen HE, Bechgaard K, Christensen JB, Frederiksen P. Electrocatalytical oxidation of glucose on graphite using covalently immobilized glucose oxidase and 1,6-dithia- and 1,6-dioxapyrenes as mediators. ELECTROANAL 1994. [DOI: 10.1002/elan.1140060905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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21
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Kulys J, Buch-Rasmussen T, Bechgaard K, Razumas V, Kazlauskaite J, Marcinkeviciene J, Christensen J, Hansen H. Study of the new electron transfer mediators in glucose oxidase catalysis. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0304-5102(94)00042-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Kulys J, Buch-Rasmussen T, Bechgaard K, Marcinkeviciene J, Hansen HE. Glucose Oxidase Electrode Based on Graphite and Methylthio Tetrathiafulvalene as Mediator. ANAL LETT 1993. [DOI: 10.1080/00032719308017971] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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23
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Kulys J, Buch-Rasmussen T, Bechgaard K, Marcinkeviciene J, Christensen JB, Hansen HE. Kinetics of glucose oxidase catalyzed electron transfer mediated by sulfur and selenium compounds. FEBS Lett 1993; 329:205-9. [PMID: 8354396 DOI: 10.1016/0014-5793(93)80222-g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Unusually high electron transfer rates in Aspergillus niger glucose oxidase catalyzed oxidation of glucose using 5,6:11,12-Bis(dithio)tetracene (TTT), 1,2-dimethyltetraselenafulvalene (DMTSF) and tetrathiafulvalene (TTF) were observed. At pH 7.0 oxidation rate constants (TN/Km) in the range from 1.0.10(7) to 8.7.10(7) M.s-1 were deduced from experimental data. One of the investigated mediators, DMTSF, has been used for electrocatalytical glucose oxidation on graphite at a potential of 0.3 V vs. a standard calomel electrode (SCE). The prepared bioelectrodes have a sensitivity of 1.3 microA/(cm2.mM), a pH optimum at 6.5-7.0, and a linear range which covers the relevant range for monitoring physiological levels of glucose. The bioelectrodes are stable for more than one month.
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Affiliation(s)
- J Kulys
- Institute of Biochemistry, Vilnius, Lithuania
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Abstract
Steady-state kinetic analysis was performed on the reaction between D-fructose and ferricyanide with the quinohemoprotein fructose dehydrogenase from Gluconobacter species. The D-fructose oxidation dependence on the ferricyanide concentration resulted in a series of parallel reciprocal plots, and the reaction was assumed to proceed by a ping-pong type of mechanism. A reciprocal plot of the reduction of ferricyanide at saturating concentration of D-fructose gave a break which was considered to appear as a result of the two active centers, namely PQQ and heme c functioning. A scheme of action is proposed and the bimolecular rate constant of the D-fructose oxidation, the kcat for PQQ and the electron transfer rate between the PQQH2 and heme c are calculated and account for 2.2 +/- 0.4 x 10(4) M-1 s-1, (93 +/- 14) and (162 +/- 7) s-1, respectively.
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Affiliation(s)
- J Marcinkeviciene
- Department of Enzyme Chemistry, Institute of Biochemistry, Vilnius, Lithuania
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Abstract
A strip-type glucose biosensor, prepared using screen-printing technology and comprising glucose oxidase (E.C.1.1.3.4.), peroxidase (E.C.1.1.3.13.) and ferrocyanide as mediator incorporated into graphite-hydroxyethyl cellulose matrices is described. The sensor acted at 0.0 V vs Ag/AgCl electrode, and the response time was 50-60 s. The calibration was linear up to 25 mM of glucose. The sensor response was constant in the range of pH 7.0-8.5. At 25 degrees C the biosensor temperature coefficient was 2.7% degrees C(-1). The sensor was insensitive to a physiological level of ascorbic acid (40 microM) and was used for glucose determination in whole blood.
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Affiliation(s)
- J Marcinkeviciene
- Institute of Biochemistry, Lithuanian Academy of Sciences, Vilnius-MTP
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